com.serenegiant.usb

接口 IFrameCallback

public interface IFrameCallback

Callback interface for UVCCamera class If you need frame data as ByteBuffer, you can use this callback interface with UVCCamera#setFrameCallback

方法概要

限定符和类型	方法和说明
void	onFrame(java.nio.ByteBuffer frame) This method is called from native library via JNI on the same thread as UVCCamera#startCapture.

方法详细资料

onFrame

void onFrame(java.nio.ByteBuffer frame)

This method is called from native library via JNI on the same thread as UVCCamera#startCapture. You can use both UVCCamera#startCapture and #setFrameCallback but it is better to use either for better performance. You can also pass pixel format type to UVCCamera#setFrameCallback for this method. Some frames may drops if this method takes a time. When you use some color format like NV21, this library never execute color space conversion, just execute pixel format conversion. If you want to get same result as on screen, please try to consider to get images via texture(SurfaceTexture) and read pixel buffer from it using OpenGL|ES2/3 instead of using IFrameCallback(this way is much efficient in most case than using IFrameCallback).

参数:

frame - this is direct ByteBuffer from JNI layer and you should handle it's byte order and limitation.